Throttle pedal controlled throttle override system

Claim 2

In a vehicle including an internal combustion engine providing a source of engine vacuum and having an air induction passage; at least one operator controlled throttle valve pivotally mounted in an air induction passage to normally regulate air flow to the engine, a valve pivotally mounted on a shaft upstream of the throttle valve in the air induction passage; and vehicle throttle pedal means operatively connected to the throttle valve; a. differential fluid pressure actuated power means including diaphragm means and at least one chamber having a movable wall defined by said diaphragm means; b. valve controlled conduit means connecting said one chamber to the source of engine vacuum and including control valve means and valve actuating means, said control valve means being operatively connected to communicate with said one chamber, and said valve actuating means being operatively connected to said vehicle throttle pedal and positioned to actuate said control valve means to place said one chamber in communication with the atmosphere; c. lost motion linkage means operatively connecting said diaphragm means of said differential fluid pressure actuated power means to said shaft and operative to permit said shaft to be normally moved between a first position and a second position when said one chamber of said differential fluid pressure actuated power means is placed in communication with the source of engine vacuum; and d. spring means operatively connected to said lost motion means and operative to effect movement of said valve from said second position to said first position when said one chamber of said differential fluid pressure actuated power means is placed in communication with the atmosphere by actuation of said control valve means.

Claim 3

In the vehicle including an internal combustion engine providing a source of engine vacuum and having a carburetor having at least a primary air induction passage and a secondary air induction passage, a primary operator controlled throttle valve pivotably mounted in the primary air induction passage and a secondary throttle valve pivotably mounted in the secondary air induction passage, the primary throttle valve and the secondary throttle valve being operative to normally regulate air flow to the engine, a choke valve pivotally mounted on a choke shaft upstream of the primary throttle valve in the primary air induction passage and an air valve pivotably mounted on air valve shaft upstream of the secondary throttle valve in the secondary air induction passage; and vehicle throttle pedal means operatively connected to the primary throttle valve and the secondary throttle valve; a. differential fluid pressure actuated power means including a housing and diaphragm means separating said housing into a first chamber and a second chamber, said second chamber being connected to communicate with the atmosphere; b. conduit means connecting said first chamber of said differential fluid pressure actuated power means to communicate with the source of engine vacuum; said conduit means including an orifice means to restrict the flow between said first chamber and the source oF engine vacuum; c. control valve means operatively connected to said first chamber and operative to connect said first chamber to selectively communicate with the atmosphere, said control valve means including valve actuator means operatively connected with the vehicle throttle pedal; and being operative upon actuation of the throttle pedal to actuate said control valve means to place said first chamber in communication with the atmosphere; d. lost motion linkage means operatively connecting said diaphragm means to both the choke shaft and to the air valve shaft and being movable between a first position in which the choke valve and air valve are operable in a normal manner between a normally closed position and a normally open position and, a second position in which the choke valve and air valve are positioned in a partly closed position between said closed position and said open position; and e. spring means operatively connected to said lost motion linkage means and operative when said vehicle throttle pedal is actuated to effect movement of said lost motion linkage means to said first position to permit normal operation of the choke valve and the air valve.

Claim 4

In the vehicle including an internal combustion engine providing a source of engine vacuum and having a carburetor having at least a primary air induction passage and a secondary air induction passage, a primary operator controlled throttle valve pivotably mounted in the primary air induction passage and a secondary throttle valve pivotably mounted in the secondary air induction passage, the primary throttle valve and the secondary throttle valve being operative to normally regulate air flow to the engine, a choke valve pivotally mounted on a choke shaft upstream of the primary throttle valve in the primary air induction passage and an air valve pivotably mounted on air valve shaft upstream of the secondary throttle valve in the secondary air induction passage; and vehicle throttle pedal means operatively connected to the primary throttle valve and the secondary throttle valve; a. differential fluid pressure actuated power means including a housing and diaphragm means separating said housing into a first chamber and a second chamber, said second chamber being connected to communicate with the atmosphere; b. conduit means connecting said first chamber of said differential fluid pressure actuated power means to communicate with the source of engine vacuum; said conduit means including an orifice means to restrict the flow between said first chamber and the source oF engine vacuum; c. control valve means operatively connected to said first chamber and operative to connect said first chamber to selectively communicate with the atmosphere, said control valve means including valve actuator means operatively connected with the vehicle throttle pedal; and being operative upon actuation of the throttle pedal to actuate said control valve means to place said first chamber in communication with the atmosphere; d. lost motion linkage means operatively connecting said diaphragm means to both the choke shaft and to the air valve shaft and being movable between a first position in which the choke valve and air valve are operable in a normal manner between a normally closed position and a normally open position and, a second position in which the choke valve and air valve are positioned in a partly closed position between said closed position and said open position; and e. spring means operatively connected to said lost motion linkage means and operative when said vehicle throttle pedal is actuated to effect movement of said lost motion linkage means to said first position to permit normal operation of the choke valve and the air valve.

Claim 5

A throttle override system for use in a vehicle including an internal combustion engine providing a source of engine vacuum and having at least one air induction passage, at least one operator-controlled throttle valve pivotably mounted in the air induction passage to normally regulate airflow to the engine, and at least one valve pivotably mounted on a shaft upstream of the throttle valve in the air induction passage for movement therein between a full open position and a closed position, the throttle override system comprising: a. differential fluid pressure actuated power means including diaphragm means and at least one chamber having a wall defined by said diaphragm means; b. lost motion linkage means operatively connecting said diaphragm means of said differential fluid pressure actuated power means to said shaft and operative to be moved to a first position in which said valve is permitted to be moved between said open position and said closed position and to a second position in which said valve is in a partly closed position between said open position and said closed position; c. spring means operatively connected to said lost motion means to normally bias said lost motion linkage means to said first position; and d. valve control means connecting said one chamber to communicate with said source of engine vacuum and including a flow orifice positioned between the source of engine vacuum and said one chamber and a pedal and valve body pivotably mounted on the vehicle and operatively connected to the throttle valve, said pedal and valve body having a passage therein connected at one of its ends to communicate with said one chamber of said differential fluid pressure actuated power means, spring means connected at one of its ends to said pedal and valve body for movement relative thereto, valve means connected to the other end of said spring means and biased thereby to normally close the other end of said passage, a pedal and valve actuating member connected to said pedal and valve body for movement relative thereto and positioned to engage said spring means when moved relative to said pedal and valve body, whereby, when an actuating force is applied to said pedal and valve actuating member, said pedal and valve actuating member engages said spring means to move said valve means opening said other end of said passage thereby placing said one chamber of said differential fluid pressure actuated power means in communication with the atmosphere.

Claim 6

A throttle override system for use in a vehicle including an internal combustion engine providing a source of engine vacuum and having at least one air induction passage, at least one operator-controlled throttle valve pivotably mounted in the air induction passage to normally regulate airflow to the engine, and at least one valve pivotably mounted on a shaft upstream of the throttle valve in the air induction passage for movement therein between a full open position and a closed position, the throttle override system comprising: a. differential fluid pressure actuated power means including diaphragm means and at least one chamber having a wall defined by said diaphragm means; b. lost motion linkage means operatively connecting said diaphragm means of said differential fluid pressure actuated power means to said shaft and operative to be moved to a first position in which said valve is permitted to be moved between said open position and said closed position and to a second position in which said valve is in a partly closed position between said open position and said closed position; c. spring means operatively connected to said lost motion means to normally bias said lost motion linkage means to said first position; and d. valve control means connecting said one chamber to communicate with said source of engine vacuum and including a flow orifice positioned between the source of engine vacuum and said one chamber and a pedal and valve body pivotably mounted on the vehicle and operatively connected to the throttle valve, said pedal and valve body having a passage therein connected at one of its ends to communicate with said one chamber of said differential fluid pressure actuated power means, spring means connected at one of its ends to said pedal and valve body for movement relative thereto, valve means connected to the other end of said spring means and biased thereby to normally close the other end of said passage, a pedal and valve actuating member connected to said pedal and valve body for movement relative thereto and positioned to engage said spring means when moved relative to said pedal and valve body, whereby, when an actuating force is applied to said pedal and valve actuating member, said pedal and valve actuating member engages said spring means to move said valve means opening said other end of said passage thereby placing said one chamber of said differential fluid pressure actuated power means in communication with the atmosphere.